BOS - MSO

$149 Find Cheap Flights from Boston to Missoula

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Missoula departing on 1/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Missoula

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Missoula, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Missoula, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$338
Overall average: $540
American Airlines
Tue 1/6Wed 1/14
BOS - MSO • 1 stop
Cheapest one-way
$149
Typical prices: $319-$1,099
Delta
Sat 1/10
BOS - MSO • 1 stop
Top airlines
United Airlines
Cheapest • from $344 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 43% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
October
Cheapest • 12% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Missoula!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Boston to Missoula (BOS-MSO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Missoula that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Missoula

Tue, Jan 6 - Wed, Jan 14
American Airlines Logo
6:42 am - 12:50 pmBOS-MSO
8h 08m1 stop
American Airlines Logo
7:00 am - 5:20 pmMSO-BOS
8h 20m1 stop
$338American Airlines
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Tue, Jan 6 - Wed, Jan 14
United Airlines Logo
10:30 am - 9:51 pmBOS-MSO
13h 21m2 stops
United Airlines Logo
6:00 am - 3:37 pmMSO-BOS
7h 37m1 stop
$344United Airlines
Find Deal
Tue, Jan 6 - Wed, Jan 14
United Airlines Logo
10:30 am - 9:51 pmBOS-MSO
13h 21m2 stops
United Airlines Logo
6:00 am - 6:57 pmMSO-BOS
10h 57m2 stops
$349United Airlines
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Mon, Jan 5 - Wed, Jan 14
United Airlines Logo
3:15 pm - 9:41 pmBOS-MSO
8h 26m1 stop
United Airlines Logo
2:37 pm - 11:46 pmMSO-BOS
7h 09m1 stop
$350United Airlines
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Thu, Dec 11 - Sun, Dec 14
Delta Logo
6:46 pm - 12:36 amBOS-MSO
7h 50m1 stop
Delta Logo
7:45 am - 8:22 pmMSO-BOS
10h 37m2 stops
$354Delta
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Mon, Jan 5 - Wed, Jan 14
United Airlines Logo
9:30 am - 9:41 pmBOS-MSO
14h 11m2 stops
United Airlines Logo
2:37 pm - 11:46 pmMSO-BOS
7h 09m1 stop
$355United Airlines
Find Deal
Mon, Jan 5 - Wed, Jan 14
United Airlines Logo
5:20 am - 4:10 pmBOS-MSO
12h 50m2 stops
United Airlines Logo
6:00 am - 6:57 pmMSO-BOS
10h 57m2 stops
$360United Airlines
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Tue, Mar 24 - Tue, Mar 31
Alaska Airlines Logo
7:00 am - 1:43 pmBOS-MSO
8h 43m1 stop
Alaska Airlines Logo
6:30 pm - 7:12 amMSO-BOS
10h 42m1 stop
$361Alaska Airlines
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Mon, Jan 5 - Wed, Jan 14
Alaska Airlines Logo
5:12 pm - 12:09 amBOS-MSO
8h 57m1 stop
Alaska Airlines Logo
2:03 pm - 11:54 pmMSO-BOS
7h 51m1 stop
$367Alaska Airlines
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Tue, Dec 2 - Tue, Dec 9
Delta Logo
2:35 pm - 12:36 amBOS-MSO
12h 01m2 stops
Delta Logo
1:13 pm - 11:41 pmMSO-BOS
8h 28m1 stop
$374Delta
Find Deal
Booking Insights

KAYAK's insights & trends for Boston to Missoula flights

Get data-powered insights and trends into flights from Boston to Missoula to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Boston to Missoula?

The average price of all round-trip flights from Boston to Missoula clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Missoula on a Wednesday and more expensive on a Saturday. On your return trip to Boston, you should consider flying back on a Tuesday, and avoid Sundays for better deals.

What is the cheapest month to fly from Boston to Missoula?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to Missoula, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boston to Missoula is October, where tickets cost $478 (return) on average. On the other hand, the most expensive months are March and April, where the average cost of round-trip tickets is $648 and $591 respectively.

How far in advance should I book a flight from Boston to Missoula?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Boston to Missoula, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Boston to Missoula, you should book around 4 weeks before departure, which saves you about 43% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$149
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from Boston to Missoula

When to book flights from Boston to Missoula

Are your dates flexible? Find out the best times to travel from Boston to Missoula based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Boston to Missoula

  • What is the cheapest flight from Boston to Missoula?

    In the last 3 days, the lowest price for a flight from Boston to Missoula was $149 for a one-way ticket and $338 for a round-trip.

  • Do I need a passport to fly between Boston and Missoula?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which aircraft models fly most regularly from Boston to Missoula?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Boston to Missoula?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Boston and Missoula, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Boston to Missoula, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Boston to Missoula are Alaska Airlines and Delta. With an average price for the route of $519 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $547 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Boston to Missoula?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to Missoula.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to Missoula?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Missoula from Boston is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to Missoula?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Missoula with an airline and back to Boston with another airline. Booking your flights between Boston and MSO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to Missoula?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Missoula from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Boston to Missoula

 
See real verified KAYAK customer reviews for airlines flying from Boston to Missoula. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to Missoula? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 11316 reviews
8.5Crew
8.1Boarding
7.8Comfort
7.0Entertainment
7.1Food
Airline reviews

I purchased a 1st class ticket and unfortunately the main flight attendant was not the best and seemed more interested in her phone than the passengers at times. Then the plane didn’t get restocked and the only snacks for this flight were pretzels. However I would like to say that the rest of the flight crew and ground crew at the airport we’re great, especially the people that wheeled me around the airport some and then the one getting me to the plane and the automated wheelchair that wheeled me through the airport.

8.0 ExcellentAaron, Nov 2025SEA - BZN
Read more Alaska Airlines reviews

I purchased a 1st class ticket and unfortunately the main flight attendant was not the best and seemed more interested in her phone than the passengers at times. Then the plane didn’t get restocked and the only snacks for this flight were pretzels. However I would like to say that the rest of the flight crew and ground crew at the airport we’re great, especially the people that wheeled me around the airport some and then the one getting me to the plane and the automated wheelchair that wheeled me through the airport.

Late. Too long a flight for a 737. 0.5 oz of pretzels for a 5+ hour flight at dinner time. One step above Ryan Air/ several below Delta.

The plane boarded late and arrived late which wasn't really ideal.

My seat. The reprentative on the phone was bad. The passengers screamed at each other and no one stopped them. The directions boarding the plane were unclear. There was a medical incident and the ICU nurse present said the women was having a cardic incident. Cooler heads determined it was a UTI. I had a allergy attack and a guy got a mask from the flight attendent and told me to wear it. He "had kidney failure". Why didnt they tell him to wear the mask, why was he even on the plane? It was embarrassing, he said hurtful things. By the way, I have a degree in Medical Micrbiology from Northwestern Medical school. MT(ASCP). Look it up. I Know the difference between allergies and an infection. But we had to listen to the unstable screaming man.

Wouldve liked a meal option (that you didnt have to prepay for) for such a long flight. But otherwise staff was friendly and boarding/un boarding was as efficient as it could be

Flight was delayed as it always is with Alaska airlines. Particularly to smaller airports. No AC on the plane so it was miserably hot.

It was a good experience! Thank you:) No sparkling mineral water… 🥲

I liked that it didn't take 10 hours to drive here. Super short trip!

Wheelchair assistance was provided in Seattle and was very gratefully accepted. Thank you to the Alaska staff.

Upon arrival I was disappointed that the assist I requested to get to the baggage claim wasn't provided. The entire baggage area was not clearly marked and I wanted to store my baggage overnight, that wasn't available. I had to take it on the shuttle to the hotel!

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

Service in business class was not impressive. I ordered coffee with dinner and then watched other people get 2 refills before I got my 1 cup of coffee, and only after I pressed the attendant button overhead. Furthermore, the seats in the forward cabin need maintenance on this 737-800: the upholstery is detaching from the seat frame, at least on the backs of seats 1C, 1D.

The ticket agents in West Palm Beach on Friday afternoon Nov. 7th were incredible in getting us on an earlier plane to Atlanta during the government shutdown. Had the taken our original flight we would have missed our connection. She did this on her own, We didn't even have to ask, and she did it all with a smile and showing genuine concern that we would be taken care of. We are very grateful and thankful. We fly often, and now we will be sure to fly Delta.

Flight delayed then cancelled. Misplaced luggage. Still do not have. Rented car 1100 mile drive. I had to buy some overnight Hotels clothes toiletries gas food at my expense. Still not home. Not sure where luggage is. Over 4 hours on hold to Felta

I truly love flying with Delta. They have always treated me with the upmost respect

Our flight attendant in FIRST CLASS was one of the worst I’ve ever had. She was not at all pleasant, nor particularly good at her service.

Everything went well and was good. Nothing exceptional, but no complaints either. Cheap seats are pretty comfortable.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Even though we were delayed, we were able to make our connection

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

Older aircraft, no meal, only food was for purchase. Not impressed United.

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Always wish for more healthy, gluten free options. We have to bring our own.

Having a long layover, I was very appreciative of the ability to stand by for an earlier flight. Other airlines like Delta have refused this to me in the past, just to be mean (because my ticket class wasn't high enough). United went out of their way to help me get to my destination early, which I really appreciated given that it was the third leg of a 24+ hour journey for me.

Other than a way way too cold cabinets for the entire flight, all was great

One bag is incorrect and not acceptable for an international flight. The food was not just good. I won't fly with them again.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

More choices on snacks. Built-in video screen to enjoy entertainment choices.

we landed at cmh ten minutes early but had to sit on tarmac for twenty minutes because a plane was at our gate despite the fact that 3 other gates were open.

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

I have a gluten allergy so did have any food

I have a gluten allergy so didn't have any food

Loved the crew . Absolutely no complaints. Except for luggage lost

Everything was good The connects, with no blame to crew. Or pilots. I understand they are short staffed. Everything went well for me. I'll be using you guys again in May if not sooner.

this plane was really old, had exit row seats and tray was in arm of seat so super uncomfortable to use. another seat they could t even use the tray it was broke. seat i. front of me had duct tape on it cause seat was ripped open... this plane should either be updated or retired.

Baggage handling poor. Second time this has happened. My bag went to San Francisco instead of Fiji. No apology. Luckily Nadi airport staff are fantastic. My bag arrived in Fiji the next day.

We loved the steward on the plane. He made the night enjoyable

Everything you need to know for your flight from Boston to Missoula

Information on your arrival and departure airports